Receiver of electrical oscillations.



I E. E. BUTCHER.

RECEIVER OF ELECTRICAL OSCILLATIONS.

APPLICATION FILED APR. 9. 1914.

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5 vwe nlfoz 7 WM W I ELmerE.Bwbch/er Patented May 15, 1917! APPLICATIONFILED APR-9,19I4.

Patented May 15, 1917.

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wi/lmwmo mm @1 I STATES ELMEB, E. nuronnn, or INTERLAKEN, NEW JERSEY,ASSIGNOR TO mencom WIRELESS "TELEGRAPH COMPANY or AMERICA, A CORPORATIONor NEW JERSEY.

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To all whom) it may concern:

Be it known that I, ELMER E. BUTCHER, a citizen of the UnitedStates, anda resident of thetown of Interlaken, in the county of '5 Mnmouth,'Stateof New Jersey, have in ventedcertain new and useful Improvements inReceivers of Electrical Oscillations, of which the following'isaspecification. My invention relates to'means for receivoing anddetecting electrical oscillations,'no

matter how produced, and may be used to .advantage wireless telegraphyand in various other connections sucl for instance, as v in wiretelegraphy or wire or wireless teleph= 5. ony. Y

In the drawings hereto annexed I have shown my invention; in connectionwith a I wireless telegraph system but, as I have said 'above, this isonly one of the many uses to 2 which it may be put and the drawings Thisaerial preferably consists of a relatively thereof.

long horizontal conductorconnected to the earth, although thisisnotnecessary to the practice of my invention, since I may use avertical'wire' or other form of aerial. The

free end of the aerial, being a point most remote electrically from theearthed point 4,

and being made a point of maximum potential, is connected to ad'etector'5. Tlus'de- 4o tector is preferably'though not necesarily,

a conductive gaseous detector, containing a plurality ,of elementsseparated by a conductive gaseous'medium," The aerial 1 1spreferablyjconnectedfto acold element 6 of '45 the detector, whiclrmaybe'in the form ot a IgI'idorme'sh. This element is-preferably 1n- 1terpos'ed between a hot element 7 and a cold element 8. Element 7 may bein the form of I a filament which is heated by a battery 9,

5( and elements may be in the form of a plate. I A local telephonecircuit cOnnectselementS 7 and8. This circuit contains-atelephone 10 ana battery 11 in series therewith.

y It should be understood that the detector is not necessarily directlyconnected to the Specification of Letters Patent.

tion that it is sometimes useful to connect the hot filament 7 to aninductance having a.

an aerial groundedat only one end and a" RECEIVER OF. ELECTRICALOSGILLATIONS.

Pateiited Ma 15, 1917.

Application filed April 9, 1914. Serial No. 830,593.

aerial, since it may be connected thereto electromagnetically orelectrostatically; and

I wish to have it understood thatjwhen I have used the term connected Iintend to include all of these equivalent methods.

I have illustrated in Fig. 2 the electrostatic coupling, which maycomprise plates such as 12 and 13, which'may be separated a variabledistance. In Fig. 3 I have shown the electromagnetic coupling, in which14 and 15 are respec tively the primary and secondary of a pair ofcoupling'coils.

I have found in thepra'ctice of my invenfree terminal such as coil,16.This coil preferably has a large number of convolutions and is adjustedfor maximum response by varying the number of'its turns. In theoperation of my device, the aerial is tuned to the periodicity of thereceived oscillations or'so adjusted as to produce maximum potential atthe detector and the constants of the detector circuit are then variedto secure the loudest response in the telephone 10.

, What I claimisfi 1. In a receiver of electrical oscillations,

etector connected. to the opposite end 2.'-In a receiver of electricaloscillations, a circuit earthed at only one end and con taining meansfor adjusting to the ,periodicity of the received oscillations adjacentto the earthed point and detecting means connected to the" circuit at apoint remote" 'from said means and. fromthe earthed end.

I 3. In a receiver of electrical oscillations, .95 a circuit earthed atonly one end and containing means for adjusting to the periodieity ofthereceivedoscillations and detecting means connected to the circuit at apoint of maximum potential remote from the'earthed end.

' LIn a receiver of electrical oscillations,

a'-'ci rcuit earthed at only one end and containing-means for adjustingto the' periodicity of received oscillations adjacent to theearthedpointand detecting means con- .nected to the circuit at a point ofmaximum fipotential remote from theearthed end. 5.'In areceiver ofelectrical oscillatlons, a circuit in the form of an extended elevated1'10 horizontal conductor earthed at onl one end and containing meansfor adjust-mg to the periodicity of received oscillations and detectingmeans connected to the circuit at a point remote from the earthed end.

6. In a receiver of electrical oscillations,,

I a receiving aerial connected to the earth at one terminal andcontaining means for adjusting to the periodicity of receivedoscillations adjacent to that terminal and at the other terminal todetecting means comprising a plurality of elements separated by aconductive. gaseous medium and-means for heating one of said elements.

9. In a receiver of electrical oscillations, a receiving aerial earthedat only one end and. containing means for adjusting to the periodicityof received oscillations and detecting means comprising a sealed vesselinclosinga plurality of elements separated by a conductive'gaseousmedium connected to v the circuit at a point of maximum potential remotefrom the earthed end. 10. In a receiver of electrical oscillations,

potential remote from thean earthed circuit, a coil having a freeterminal and detecting means connected to the coil and to the circuit ata point remote from the earthed point.

-11. In a receiver of electrical oscillations, an earthed circuitcontaining means for adusting to the periodicity of the receivedoscillations adjacent to theearthed point, a coil having. a freeterminal and detecting means connected to the coil and to the circuit ata point of maximum potential remote from the earthed point.

12. In a receiver of electrical oscillations, detecting means comprisinga plurality of elements separated by" a conductive gaseous medium, meansfor heating one of said ele-.

ments, a coil having a free end connected to the heated element, and anearthed circuit connected to one of the cold elements at a point remotefrom the earthed point.

13. In a receiver of electrical oscillations,

detecting means comprising a sealed-vessel inclosing a plurality ofelementsseparated by a conductive gaseous medium, means for heating oneof said elements a coil connected to the heated element and having afree end and an earthed circuit containing means for adjusting to theperiodicity of the received oscillations adjacent .to theearthed pointconnected to one of the cold elements at a point of maximum potentialremote from the earthed'point. I

In Witness whereof I v have hereunto signed'my name in the presence oftwo Witnesses this 8th day of April, 1914. i. ELMER E. BUTCHER.

Witnesses: 1

WALTER S. JoNns, MARGARET MACINTYRE.

